keyrune/sass/components/_setsymbol.scss

// set symbol class
.#{$keyrune_prefix} {
  display: $setsymbol_display;
  font: $setsymbol_font;
  font-size: $setsymbol_font_size;
  line-height: $setsymbol_line_height;
  text-rendering: $setsymbol_text_rendering;
  transform: $setsymbol_transform;
  speak: $setsymbol_speak;
  text-transform: $setsymbol_text_transform;
  vertical-align: $setsymbol_vertical_align;
  // Better font rendering
  -webkit-font-smoothing: $setsymbol_webkit_font_smoothing;
  -moz-font-smoothing: $setsymbol_moz_font_smoothing;

  // default symbol if the set does not exist yet, or setcode does not match
  &:before {
    content: $setsymbol_default_content;
  }
}

// set symbol size modifier classes
@each $size in $symbol_sizes {
  .#{$keyrune_prefix}.#{nth($size, 1)} {
    font-size: #{nth($size, 2)}
  }
}